Equivalent & Substitute Parts for T491C105K050AS-F

Part Overview

The T491C105K050AS-F is a 1 µF molded tantalum capacitor rated at 50 V, manufactured by Cornell Dubilier Electronics (CDE) in the 2312 (6032 Metric) package. This component is classified as obsolete, necessitating identification of active equivalent alternatives to maintain design continuity and ensure supply chain availability. Substitute parts must maintain identical electrical specifications and mechanical compatibility to function as direct replacements in existing circuit designs.

Substiute Parts

T491C105K050AS-F

Cornell Dubilier Electronics (CDE)In Stock: 953T491C105K050AS-F Datasheet

Current PartRFQ

T491C105K050AT

KEMETIn Stock: 1752T491C105K050AT Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the T491C105K050AS-F are identified based on strict equivalence across all critical electrical and mechanical parameters. The substitution logic requires:

Electrical Parameters (Must Match Exactly):

• Capacitance: 1 µF
• Voltage Rating: 50 V
• Tolerance: ±10%
• Type: Molded Tantalum

Mechanical Parameters (Must Match Exactly):

• Package / Case: 2312 (6032 Metric)
• Mounting Type: Surface Mount
• Physical Dimensions: 0.236" L x 0.126" W (6.00mm x 3.20mm)
• Height - Seated (Max): 0.110" (2.80mm)

Environmental & Compliance Parameters (Must Match or Exceed):

• Operating Temperature Range: -55°C ~ 125°C
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level: 1 (Unlimited)

The T491C105K050AT qualifies as a direct substitute based on complete alignment with these parameters. The transition from CDE (obsolete) to KEMET (active) maintains full functional and physical compatibility while providing active product status and improved supply availability.

Parameter Comparison

Engineering Selection Recommendations

The T491C105K050AT is a qualified direct substitute for the T491C105K050AS-F based on the following engineering criteria:

Product Status Alignment: The substitute part (T491C105K050AT) maintains active product status with KEMET, ensuring long-term availability and supply chain continuity. The original part (T491C105K050AS-F) is classified as obsolete, making substitution necessary for ongoing production and maintenance applications.

Electrical Equivalence: All critical electrical parameters are identical: 1 µF capacitance, 50 V voltage rating, ±10% tolerance, and molded tantalum construction. The substitute provides additional performance data (5.5 Ohm ESR and 2000 Hrs @ 125°C lifetime rating) that was not specified for the original part, indicating equivalent or superior performance characteristics.

Mechanical Compatibility: Physical dimensions, package type (2312/6032 Metric), and surface mount configuration are identical, ensuring direct PCB compatibility without layout modifications or rework.

Regulatory Compliance: Both parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, satisfying environmental and handling requirements for equivalent applications.

Series Continuity: Both parts belong to the T491 series, confirming design family compatibility and functional equivalence within the tantalum capacitor product line.

Frequently Asked Questions (FAQ)

Q: Can the T491C105K050AT be used as a direct replacement for the T491C105K050AS-F without PCB modifications?

A: Yes. The T491C105K050AT is a direct substitute with identical package dimensions (2312/6032 Metric), mounting type (surface mount), and electrical specifications (1 µF, 50 V, ±10%). No PCB layout changes are required.

Q: What is the primary reason for substitution?

A: The original part (T491C105K050AS-F) is classified as obsolete. The T491C105K050AT provides an active equivalent from KEMET, ensuring supply availability and long-term design support.

Q: Are the electrical specifications identical between the two parts?

A: Yes. Both parts have identical capacitance (1 µF), voltage rating (50 V), tolerance (±10%), and operating temperature range (-55°C ~ 125°C). The substitute provides additional performance specifications (5.5 Ohm ESR, 2000 Hrs @ 125°C) that were not documented for the original part.

Q: Do both parts meet the same regulatory requirements?

A: Yes. Both parts are ROHS3 compliant and have MSL 1 (Unlimited) moisture sensitivity rating, meeting equivalent environmental and handling standards.

Q: What is the difference in packaging availability?

A: The original part (T491C105K050AS-F) is listed as standard packaging. The substitute (T491C105K050AT) is available in Cut Tape (CT) and Digi-Reel® packaging options, providing flexibility for different procurement volumes.

Q: Are there any performance differences between the two parts?

A: The substitute part provides documented ESR (5.5 Ohm) and lifetime rating (2000 Hrs @ 125°C), which were not specified for the original part. These specifications indicate equivalent or superior performance for the same electrical rating.

Q: Can the T491C105K050AT be used in applications requiring the original CDE part?

A: Yes. The T491C105K050AT meets all electrical, mechanical, and environmental requirements of the original part and is fully compatible with existing circuit designs and PCB assemblies.